Monodispersed water-in-oil emulsions prepared with semi-metal microfluidic EDGE systems

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Monodispersed water-in-oil emulsions were prepared with EDGE (Edge based Droplet GEneration) systems, which generate many droplets simultaneously from one junction. The devices (with plateau height of 1.0 µm) were coated with Cu and CuNi having the same hydrophobicity but different surface roughness. Emulsification was performed by using water as dispersed phase and oils with different viscosities (hexadecane, decane, hexane and sunflower oil) as continuous phases; lecithin, polyglycerol polyricinoleate (PGPR) and span80 were used as emulsifiers. The roughness affected the emulsification behaviour significantly. The smoother Cu surface exhibited droplet formation over the entire length of the droplet formation unit, while the rougher CuNi surface showed non-uniform filling of the plateau and much lower droplet formation frequency. In spite of this different behaviour, monodispersed droplets (CV
Original languageEnglish
Pages (from-to)187-196
JournalMicrofluidics and Nanofluidics
Issue number1
Publication statusPublished - 2013


  • premix membrane emulsification
  • droplet formation
  • microchannel emulsification
  • microcapsules
  • devices

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